Viper II Class C 6 mil VaporCheck Vapor Barrier Under Slab Vapor Barrier 14' x 210' Spartan Design Alpha Professional Tools® introduced a build ramps Alpha Professional Tools® introduced a lippage disc designed specifically for this application Elongation: 202% Viper II 6 mil controls condensation Viper II 6 mil is a unique high strength polyolefin based under slab vapor retarder specifically designed for preventing moisture migration through concrete slabson grade
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